Type-writing machine.



No. 720,763. 7 PATBNTED FEB. 17, 1903.

' G. W. WALKER.

TYPE WRITING MACHINE.

APPLICATION FILED NOV. 26, 1902 no MODEL. v 2 SHEETS-SHEET 1 iii %j"fzze ej: CZ fizvezzfor:

No. 720,763. PAT-EDITED FEB. 1'7, 1903;

v C. W. WALKER.

TYPE WRITING MACHINE.

APPLIUATIGN FILED NOV. 26, 1902. 7 no MODEL. 7 2 snnnrs-sazs'r 2.

UNITED STATES PATENT OFFICE.

CHARLES WALKER, OF BRIDGEPORT, CONNECTICUT, Ass1eNoR TO YOST WRITING MACHINE COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHIN E.

SPECIFICATION forming part of Letters Patent No. '720,763, dated February 17, 1903.

Original application filed December 21, 1901, Serial No. 86,821. Divided and this application filed November 28, 1902. Serial No. 132,891. (No model.)

T or whom it may concern: 7 of which rests in open slot-bearings 8 in the Beitknown thatI, CHARLES W. WALKER-,a arms 9, one being provided at each end of the 50 citizen of the United States, and a resident shaft. These arms orlinks 9 are pivoted to the of Bridgeport, in the county of Fairfield and rear bar 10 of the platen-frame, and to each State of Connecticut, have invented certain arm is connected at 11 one end of a coiled new and useful Improvements in Type-Nritspring 12, that surrounds the bar of the ing Machines, of which the following is a platen-frame. The opposite end 13 of each specification. spring is connected to a worm wheel or gear My invention relates to type-writing ma- 1%, which is contained within a housing 15.

1o chines, and more particularly to tension-ad- (Shown in detail in Fig. 3.) -This housing is justing devices therefor; and the object of provided with apertures 16 for the reception said invention is to provide simple and effiof beaded screws 17, the stems of which pass cient means of the character specified. through the housing and take into the mem- To the above and other ends which will ber 18 Orin the end bar2 of the platen-frame,

I 5 hereinafter appear my invention consists in so that the housing is rigidly'secured thereto. thefeatures of construction, arrangements of Each worm-Wheel 14 rotates upon the rear parts, and combinations of devices to be bar 10 of the platen-frame, and the housings hereinafter described and claimed. are each providedwith bearings 19 fora Worm- In the accompanying drawings, wherein screw 20, which cooperates with a Worm- 20 like reference characters indicate correspond wheel 14. It having been explained that one ing parts in the various views, Figure l is a end of each of the springs 12 is connected to plan view of a type-Writer carriage with the a worm-wheel, it will be understood that a features of my invention applied thereto. turning ofthe worm-wheel will adjust the ten- Fig. 2 is an end view of the same. Fig. 3 is sion of its spring, and thus regulate thep'res- 25 a detail perspective view, on an enlarged sure of the feed-roller 6 against the platen or scale, of the so-called housing of the adthe paper thereon. justing device. Fig. 4 is a vertical front to The construction of the adjusting means rear sectional view taken through the carfor the spring 12 is the same at both ends of riage and corresponding substantially to a the feed-roller, so that an independent ad- 30 section taken on the line a; a; of Fig. 1. Fig. justment maybe provided at each end of the 5 is a fragmentary plan view, partly in secroller in order to insure an even distribution tion, of one of the adjusting devices, the view of pressure, and consequently a straight feedbeing on an enlarged scale. Fig. 6 is a side ing of the paper. or end view of the same looking in the direc- The link 9, which supports the left-hand 3 5 tion of the arrow in Fig. 5. Fig. 7 is a fragend of the feed-roller, has rigidly connected inentary detail perspective view of one of the thereto by a screw 21 a forwardly-extending adjusting devices and the parts with which it arm 22, which is fastened into a finger-key cooperates. 23 at its forward end and is pivoted at its rear 'The present case is a division of my appliend to the bar 10. By depressing the finger v 40 cation, Serial No. 86,821, filed December 21, key or piece 23 the paper-feed roller 6 will be 1901. forced out of contact with the platen or the The platen-frame is made up of a yoke-like paper thereon and the paper maybe easily frame 1, the free ends of which are united by adjusted to any desired position on the platen.

an end bar 2, a platen 3 revolving in bear- Each of the links 9 supports a spring-arm 45 ings in the cross-headof the yoke-like frame 24, and the lower or free ends of these arms and in the end bar2 and being provided with are connected by a paper blade or scale 25,

the usual fingenwheels 5. Cooperating with which extends substantially.throughout the the platen 3 is a paper-feed roller 6, the shaft length of the platen and normally presses 23 operates to move both the feed-roller and paper-blade away from the platen in order that the paper may be freely introduced and adjusted on the platen.

One end of each of the worm-screws 20 extends beyond the bearing 19 thereof and has a nicked head 28, by means of which the screws may be turned to the desired extent with the aid of a screw-driver or like tool in order to turn the worm-wheels, and thus provide the requisite adjustment of the spring tension for the paper-feed roller.

It will be observed that by my invention 1 provide simple and efficient means whereby a nice adjustment of the tension of the springs on the paper-feed roller may be eifected and that there is no liability of the adjusting devices creeping, and thereby destroying or disarranging the adjustment of the parts.

Various changes in details of construction may be made without departing from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a type-writing machine, the combination of a platen, a paper-feed roller, a spring for pressing said feed-roller in contact with the platen, and adjusting means for adj usting the tension of said spring, said adjusting means comprisinga worm-screw, and a wormwheel which is secured to one end of said spring.

2. In a type-writing machine, the combination of a platen, a paper-feed roller, a spring at each end of said roller for normally maintaining said feed-roller in contact with the platen and means for adjusting the tension of each of said springs, said adjusting means each comprising a worm-screw, a worm-wheel which is secured to one end of a spring, and a relatively fixed housing for said wormwheel, and a bearing on said housing for said worm-screw.

3. In a type-writing machine, the combination of a platen, a feed-roller, pivoted arms which carry said roller, a worm-wheel, a pivotal support therefor, a coiled spring attached at one end to the worm-wheel and at the opposite end to one of the roller-carryingarms and a worm-screw for turning said worm- Wheel and for adjusting the tension of said spring.

4:. In a type-writing machine, the combination of a platen, a pressure-roller, a platenframe, including a rod or bar 10, arms pivoted on said rod for supporting said roller, pressure-springs surrounding said rod and connected each at one end to one of said arms and tension-ad j usting devices for each spring, comprising a worm-wheel mounted to turn on said rod and attached to one end of said spring, a housing for said worm-wheel attached to the platen-frame, and a worm-screw having a bearing in said housing and engaging said worm-wheel.

5. In a type-writing machine, the combination of a platen, a paper-feed roller, a spring for normally maintaining said feed-roller in contact with the platen and adjusting means for adjusting the tension of said spring, said adjusting means including a worm-screw.

6. In a type-writing machine, the combination of a platen, a paper-feed roller, a spring for normally maintaining said feed-roller in contact with the platen, and adjusting means for adjusting the tension of said spring, said adjusting means comprising a Worm-screw, a worm-wheel which is secured to one end of said spring, and cooperates with said wormwheel and a housing which contains said worm-wheel and constitutes a bearing for the worm-screw.

7. In a type-Writing machine, the combination of a platen, a paper-feed roller, a spring at each end of said roller for normally maintaining said feed-roller in contact with the platen, and adjusting means for adjusting the tension of each of said springs, said adjusting means each including a worm-screw.

8. In a type-writing machine, the combination of a platen, a paper-feed roller, a spring at each end of said roller for normally maintaining it in contact with the platen and adjusting means for adjusting the tension of each of said springs, said adjusting means each comprising a worm-screw and a wormwheel which is secured to one end of each of said springs.

9. In a type-writing machine, the combination of a platen, a platen-frame, links pivoted thereto, a shaft supported by said platenframe, coiled springs surrounding a bar of said platen-frame and each connected at one end to one of said links, a worm-wheel connected to the opposite end of each spring and a worm-screw for each of said worm-wheels.

10. In a type-Writing machine, the combination of a platen, a platen-frame, links pivoted thereto, a shaft supported by said platenframe, coiled springs surrounding a bar of said platen-frame and each connected at one end to one of said links, worm-wheels that turn on a bar of the platen-frame, and each of which is connected to an end of one of said springs, a housing for each of said wormwheels, a worm-screw carried by each of said housings and cooperating with the associated worm-wheel, and means for affording the adjustment of said worm-screws.

11. In a type-writing machine, the combination of a platen, a platen-frame, hooks pivoted thereto, a shaft supported by said platent'rame, coiled springs surrounding a bar of said platen-frame and each connected at one end to one of said links, worm-wheels that turn on the bar of the platen-frame, which is surrounded by the coiled springs and each of nation of a platen, a paper-feed roller, a spring for pressing said feed-roller in contact with the platen, an adjustable worm-screw, and a worm-gear controlled by said worm-screw for adjusting the tension of said spring.

14. In a type-writing machine, the combination of a platen, a feed-roller, pivoted arms which carry said feed-roller, a spring for each arm, and independently-adjustable wormgearing for each of said springs.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 24th day of November, A. D. 1902.

CHARLES W. WALKER.

Witnesses:

K. V. DONOVAN, E. M. WELLS. 

